Displacement Pattern of Anterior and Posterior Column Fragments in Both-Column Acetabular Fractures: A 3D Reconstruction-Based Study
Table 2
Displacement distance and direction of marked points and rotation angle for the AC fragment.
Parameter
Distance† (mm or °)
Direction‡
value
Positive sign
Negative sign
(i)ASIS point
x-axis
-5.74 (9.82)
8 (9.9)
73 (90.1)
<0.001
y-axis
4.03 (7.56)
61 (75.3)
20 (24.7)
<0.001
z-axis
-1.80 (8.85)
32 (39.5)
49 (60.5)
0.075
Spatial
10.39 (9.28)
—
—
ACU point
x-axis
-2.67 (9.95)
33 (40.7)
48 (59.3)
0.119
y-axis
-2.19 (9.60)
24 (29.6)
57 (70.4)
<0.001
z-axis
2.30 (6.01)
58 (71.6)
23 (28.4)
<0.001
Spatial
10.96 (7.97)
—
—
ACP point
x-axis
9.41 (10.16)
75 (92.6)
6 (7.4)
<0.001
y-axis
-0.82 (5.99)
34 (42.0)
47 (58.0)
0.182
z-axis
6.93 (7.48)
77 (95.1)
4 (4.9)
<0.001
Spatial
12.58 (9.95)
—
—
ACA point
x-axis
4.21 (5.61)
68 (84.0)
13 (16.0)
<0.001
y-axis
-4.08 (7.15)
18 (22.2)
63 (77.8)
<0.001
z-axis
5.54 (5.82)
75 (92.6)
6 (7.4)
<0.001
Spatial
10.10 (7.06)
—
—
Angle α
7.93 (10.40)
78 (96.3)
3 (3.7)
<0.001
†, Data are given as the median and interquartile range (IQR). ‡, Data are presented as counts (percentages). , Binomial test was applied for the displacement direction.
